<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }
      .list {
        font-size: 0;
      }
      li {
        width: 300px;
        height: 100px;
        font-size: 16px;
        float: left;
      }
      li:nth-child(1) {
        background: red;
      }
      li:nth-child(2) {
        background: orange;
      }
      li:nth-child(3) {
        background: yellow;
      }
    </style>
  </head>
  <body>
    <ul class="list">
      <li>1</li>
      <li>2</li>
      <li>3</li>
    </ul>

    <h2 class="title">hello</h2>
  </body>
</html>
